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©2013 UpToDate ® Print Email Aphthous lesions in Crohn's disease Colonoscopy demonstrates small discreet aphthous lesions (superficial ulcerations) that are characteristic of early lesions in Crohn's disease. Courtesy of James B McGee, MD.
©2013 UpToDate ® Print Email Aphthous lesions in Crohn's disease Colonoscopy demonstrates small discreet aphthous lesions (superficial ulcerations) that are characteristic of early lesions in Crohn's disease. Courtesy of James B McGee, MD. Linear ulcerations in Crohn's disease Colonoscopy shows linear ulcers that can course for several centimeters along the longitudinal axis of the colon in Crohn's disease. Courtesy of James B McGee, MD. Asymmetric distribution of lesions in Crohn's disease Colonoscopy in Crohn's disease demonstrates the characteristic patchy erythema (left panel) and ulceration (right panel) that occur next to areas of normal mucosa. Courtesy of James B McGee, MD.